Short and sweet was the amount of time it took the iPhone Dev-Team to jailbreak iOS 4, at least as far the previous generation of Apple iHardware is concerned. Adding to yesterday’s release of redsn0w beta, PwnageTool 4.0 was set free this afternoon and promises to jailbreak/hacktivate devices provided a specific set of criteria are met. If you want to get really fancy, you can also use a special version of ultrasn0w to unlock your iPhone, but again, this is dependant upon certain things being just so. We’ve got everything you’ll need to get the job done queued up, so don’t be afraid to hit up the jump get get started. Happy jailbreaking!